// sparc.cc -- sparc target support for gold.
-// Copyright 2008 Free Software Foundation, Inc.
+// Copyright 2008, 2009 Free Software Foundation, Inc.
// Written by David S. Miller <davem@davemloft.net>.
// This file is part of gold.
#include "target-select.h"
#include "tls.h"
#include "errors.h"
+#include "gc.h"
namespace
{
{
}
+ // Process the relocations to determine unreferenced sections for
+ // garbage collection.
+ void
+ gc_process_relocs(Symbol_table* symtab,
+ Layout* layout,
+ Sized_relobj<size, big_endian>* object,
+ unsigned int data_shndx,
+ unsigned int sh_type,
+ const unsigned char* prelocs,
+ size_t reloc_count,
+ Output_section* output_section,
+ bool needs_special_offset_handling,
+ size_t local_symbol_count,
+ const unsigned char* plocal_symbols);
+
// Scan the relocations to look for symbol adjustments.
void
- scan_relocs(const General_options& options,
- Symbol_table* symtab,
+ scan_relocs(Symbol_table* symtab,
Layout* layout,
Sized_relobj<size, big_endian>* object,
unsigned int data_shndx,
const unsigned char* plocal_symbols);
// Finalize the sections.
void
- do_finalize_sections(Layout*);
+ do_finalize_sections(Layout*, const Input_objects*, Symbol_table*);
// Return the value to use for a dynamic which requires special
// treatment.
bool needs_special_offset_handling,
unsigned char* view,
typename elfcpp::Elf_types<size>::Elf_Addr view_address,
- section_size_type view_size);
+ section_size_type view_size,
+ const Reloc_symbol_changes*);
// Scan the relocs during a relocatable link.
void
- scan_relocatable_relocs(const General_options& options,
- Symbol_table* symtab,
+ scan_relocatable_relocs(Symbol_table* symtab,
Layout* layout,
Sized_relobj<size, big_endian>* object,
unsigned int data_shndx,
section_size_type reloc_view_size);
// Return whether SYM is defined by the ABI.
bool
- do_is_defined_by_abi(Symbol* sym) const
+ do_is_defined_by_abi(const Symbol* sym) const
{
// XXX Really need to support this better...
if (sym->type() == elfcpp::STT_SPARC_REGISTER)
return strcmp(sym->name(), "___tls_get_addr") == 0;
}
+ // Return whether there is a GOT section.
+ bool
+ has_got_section() const
+ { return this->got_ != NULL; }
+
// Return the size of the GOT section.
section_size_type
got_size()
{ }
inline void
- local(const General_options& options, Symbol_table* symtab,
- Layout* layout, Target_sparc* target,
+ local(Symbol_table* symtab, Layout* layout, Target_sparc* target,
Sized_relobj<size, big_endian>* object,
unsigned int data_shndx,
Output_section* output_section,
const elfcpp::Sym<size, big_endian>& lsym);
inline void
- global(const General_options& options, Symbol_table* symtab,
- Layout* layout, Target_sparc* target,
+ global(Symbol_table* symtab, Layout* layout, Target_sparc* target,
Sized_relobj<size, big_endian>* object,
unsigned int data_shndx,
Output_section* output_section,
// any warnings about this relocation.
inline bool
relocate(const Relocate_info<size, big_endian>*, Target_sparc*,
- size_t relnum, const elfcpp::Rela<size, big_endian>&,
+ Output_section*, size_t relnum,
+ const elfcpp::Rela<size, big_endian>&,
unsigned int r_type, const Sized_symbol<size>*,
const Symbol_value<size>*,
unsigned char*,
Reloc_section*
rela_dyn_section(Layout*);
- // Return true if the symbol may need a COPY relocation.
- // References from an executable object to non-function symbols
- // defined in a dynamic object may need a COPY relocation.
- bool
- may_need_copy_reloc(Symbol* gsym)
- {
- return (!parameters->options().shared()
- && gsym->is_from_dynobj()
- && gsym->type() != elfcpp::STT_FUNC);
- }
-
// Copy a relocation against a global symbol.
void
- copy_reloc(Symbol_table* symtab, Layout* layout, Relobj* object,
+ copy_reloc(Symbol_table* symtab, Layout* layout,
+ Sized_relobj<size, big_endian>* object,
unsigned int shndx, Output_section* output_section,
Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc)
{
"/usr/lib/ld.so.1", // dynamic_linker
0x00010000, // default_text_segment_address
64 * 1024, // abi_pagesize (overridable by -z max-page-size)
- 8 * 1024 // common_pagesize (overridable by -z common-page-size)
+ 8 * 1024, // common_pagesize (overridable by -z common-page-size)
+ elfcpp::SHN_UNDEF, // small_common_shndx
+ elfcpp::SHN_UNDEF, // large_common_shndx
+ 0, // small_common_section_flags
+ 0, // large_common_section_flags
+ NULL, // attributes_section
+ NULL // attributes_vendor
};
template<>
"/usr/lib/sparcv9/ld.so.1", // dynamic_linker
0x100000, // default_text_segment_address
64 * 1024, // abi_pagesize (overridable by -z max-page-size)
- 8 * 1024 // common_pagesize (overridable by -z common-page-size)
+ 8 * 1024, // common_pagesize (overridable by -z common-page-size)
+ elfcpp::SHN_UNDEF, // small_common_shndx
+ elfcpp::SHN_UNDEF, // large_common_shndx
+ 0, // small_common_section_flags
+ 0, // large_common_section_flags
+ NULL, // attributes_section
+ NULL // attributes_vendor
};
// We have to take care here, even when operating in little-endian
this->got_ = new Output_data_got<size, big_endian>();
- layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
- elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
- this->got_);
+ Output_section* os;
+ os = layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
+ (elfcpp::SHF_ALLOC
+ | elfcpp::SHF_WRITE),
+ this->got_, false);
+ os->set_is_relro();
// Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section.
symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
if (this->rela_dyn_ == NULL)
{
gold_assert(layout != NULL);
- this->rela_dyn_ = new Reloc_section();
+ this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
- elfcpp::SHF_ALLOC, this->rela_dyn_);
+ elfcpp::SHF_ALLOC, this->rela_dyn_, true);
}
return this->rela_dyn_;
}
protected:
void do_adjust_output_section(Output_section* os);
+ // Write to a map file.
+ void
+ do_print_to_mapfile(Mapfile* mapfile) const
+ { mapfile->print_output_data(this, _("** PLT")); }
+
private:
// The size of an entry in the PLT.
static const int base_plt_entry_size = (size == 32 ? 12 : 32);
Output_data_plt_sparc<size, big_endian>::Output_data_plt_sparc(Layout* layout)
: Output_section_data(size == 32 ? 4 : 8), count_(0)
{
- this->rel_ = new Reloc_section();
+ this->rel_ = new Reloc_section(false);
layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
- elfcpp::SHF_ALLOC, this->rel_);
+ elfcpp::SHF_ALLOC, this->rel_, true);
}
template<int size, bool big_endian>
(elfcpp::SHF_ALLOC
| elfcpp::SHF_EXECINSTR
| elfcpp::SHF_WRITE),
- this->plt_);
+ this->plt_, false);
// Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section.
symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL,
case elfcpp::R_SPARC_TLS_IE_LO10:
case elfcpp::R_SPARC_TLS_IE_LD:
case elfcpp::R_SPARC_TLS_IE_LDX:
+ case elfcpp::R_SPARC_TLS_IE_ADD:
// These are Initial-Exec relocs which get the thread offset
// from the GOT. If we know that we are linking against the
// local symbol, we can switch to Local-Exec, which links the
// error per object file.
if (this->issued_non_pic_error_)
return;
+ gold_assert(parameters->options().output_is_position_independent());
object->error(_("requires unsupported dynamic reloc; "
"recompile with -fPIC"));
this->issued_non_pic_error_ = true;
template<int size, bool big_endian>
inline void
Target_sparc<size, big_endian>::Scan::local(
- const General_options&,
Symbol_table* symtab,
Layout* layout,
Target_sparc<size, big_endian>* target,
case elfcpp::R_SPARC_TLS_IE_LO10:
case elfcpp::R_SPARC_TLS_IE_LD:
case elfcpp::R_SPARC_TLS_IE_LDX:
+ case elfcpp::R_SPARC_TLS_IE_ADD:
case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec
case elfcpp::R_SPARC_TLS_LE_LOX10:
{
case elfcpp::R_SPARC_TLS_IE_LO10:
case elfcpp::R_SPARC_TLS_IE_LD:
case elfcpp::R_SPARC_TLS_IE_LDX:
+ case elfcpp::R_SPARC_TLS_IE_ADD:
layout->set_has_static_tls();
if (optimized_type == tls::TLSOPT_NONE)
{
template<int size, bool big_endian>
inline void
Target_sparc<size, big_endian>::Scan::global(
- const General_options&,
Symbol_table* symtab,
Layout* layout,
Target_sparc<size, big_endian>* target,
{
unsigned int orig_r_type = r_type;
+ // A reference to _GLOBAL_OFFSET_TABLE_ implies that we need a got
+ // section. We check here to avoid creating a dynamic reloc against
+ // _GLOBAL_OFFSET_TABLE_.
+ if (!target->has_got_section()
+ && strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0)
+ target->got_section(symtab, layout);
+
r_type &= 0xff;
switch (r_type)
{
flags |= Symbol::FUNCTION_CALL;
if (gsym->needs_dynamic_reloc(flags))
{
- if (target->may_need_copy_reloc(gsym))
+ if (gsym->may_need_copy_reloc())
{
target->copy_reloc(symtab, layout, object,
data_shndx, output_section, gsym,
// Make a dynamic relocation if necessary.
if (gsym->needs_dynamic_reloc(Symbol::ABSOLUTE_REF))
{
- if (target->may_need_copy_reloc(gsym))
+ if (gsym->may_need_copy_reloc())
{
target->copy_reloc(symtab, layout, object,
data_shndx, output_section, gsym, reloc);
case elfcpp::R_SPARC_TLS_IE_LO10:
case elfcpp::R_SPARC_TLS_IE_LD:
case elfcpp::R_SPARC_TLS_IE_LDX:
+ case elfcpp::R_SPARC_TLS_IE_ADD:
{
const bool is_final = gsym->final_value_is_known();
const tls::Tls_optimization optimized_type
case elfcpp::R_SPARC_TLS_IE_LO10:
case elfcpp::R_SPARC_TLS_IE_LD:
case elfcpp::R_SPARC_TLS_IE_LDX:
+ case elfcpp::R_SPARC_TLS_IE_ADD:
layout->set_has_static_tls();
if (optimized_type == tls::TLSOPT_NONE)
{
}
}
+// Process relocations for gc.
+
+template<int size, bool big_endian>
+void
+Target_sparc<size, big_endian>::gc_process_relocs(
+ Symbol_table* symtab,
+ Layout* layout,
+ Sized_relobj<size, big_endian>* object,
+ unsigned int data_shndx,
+ unsigned int,
+ const unsigned char* prelocs,
+ size_t reloc_count,
+ Output_section* output_section,
+ bool needs_special_offset_handling,
+ size_t local_symbol_count,
+ const unsigned char* plocal_symbols)
+{
+ typedef Target_sparc<size, big_endian> Sparc;
+ typedef typename Target_sparc<size, big_endian>::Scan Scan;
+
+ gold::gc_process_relocs<size, big_endian, Sparc, elfcpp::SHT_RELA, Scan>(
+ symtab,
+ layout,
+ this,
+ object,
+ data_shndx,
+ prelocs,
+ reloc_count,
+ output_section,
+ needs_special_offset_handling,
+ local_symbol_count,
+ plocal_symbols);
+}
+
// Scan relocations for a section.
template<int size, bool big_endian>
void
Target_sparc<size, big_endian>::scan_relocs(
- const General_options& options,
Symbol_table* symtab,
Layout* layout,
Sized_relobj<size, big_endian>* object,
}
gold::scan_relocs<size, big_endian, Sparc, elfcpp::SHT_RELA, Scan>(
- options,
symtab,
layout,
this,
template<int size, bool big_endian>
void
-Target_sparc<size, big_endian>::do_finalize_sections(Layout* layout)
+Target_sparc<size, big_endian>::do_finalize_sections(
+ Layout* layout,
+ const Input_objects*,
+ Symbol_table*)
{
// Fill in some more dynamic tags.
Output_data_dynamic* const odyn = layout->dynamic_data();
if (odyn != NULL)
{
- if (this->plt_ != NULL)
+ if (this->plt_ != NULL
+ && this->plt_->output_section() != NULL)
{
const Output_data* od = this->plt_->rel_plt();
odyn->add_section_size(elfcpp::DT_PLTRELSZ, od);
odyn->add_section_address(elfcpp::DT_PLTGOT, this->plt_);
}
- if (this->rela_dyn_ != NULL)
+ if (this->rela_dyn_ != NULL
+ && this->rela_dyn_->output_section() != NULL)
{
const Output_data* od = this->rela_dyn_;
odyn->add_section_address(elfcpp::DT_RELA, od);
Target_sparc<size, big_endian>::Relocate::relocate(
const Relocate_info<size, big_endian>* relinfo,
Target_sparc* target,
+ Output_section*,
size_t relnum,
const elfcpp::Rela<size, big_endian>& rela,
unsigned int r_type,
// Pick the value to use for symbols defined in shared objects.
Symbol_value<size> symval;
if (gsym != NULL
- && (gsym->is_from_dynobj()
- || (parameters->options().shared()
- && (gsym->is_undefined() || gsym->is_preemptible())))
- && gsym->has_plt_offset())
+ && gsym->use_plt_offset(r_type == elfcpp::R_SPARC_DISP8
+ || r_type == elfcpp::R_SPARC_DISP16
+ || r_type == elfcpp::R_SPARC_DISP32
+ || r_type == elfcpp::R_SPARC_DISP64
+ || r_type == elfcpp::R_SPARC_PC_HH22
+ || r_type == elfcpp::R_SPARC_PC_HM10
+ || r_type == elfcpp::R_SPARC_PC_LM22
+ || r_type == elfcpp::R_SPARC_PC10
+ || r_type == elfcpp::R_SPARC_PC22
+ || r_type == elfcpp::R_SPARC_WDISP30
+ || r_type == elfcpp::R_SPARC_WDISP22
+ || r_type == elfcpp::R_SPARC_WDISP19
+ || r_type == elfcpp::R_SPARC_WDISP16))
{
elfcpp::Elf_Xword value;
case elfcpp::R_SPARC_32:
if (!parameters->options().output_is_position_independent())
- Relocate_functions<size, big_endian>::rela32(view, object,
- psymval, addend);
+ Relocate_functions<size, big_endian>::rela32(view, object,
+ psymval, addend);
break;
case elfcpp::R_SPARC_DISP8:
case elfcpp::R_SPARC_TLS_IE_LO10:
case elfcpp::R_SPARC_TLS_IE_LD:
case elfcpp::R_SPARC_TLS_IE_LDX:
+ case elfcpp::R_SPARC_TLS_IE_ADD:
case elfcpp::R_SPARC_TLS_LE_HIX22:
case elfcpp::R_SPARC_TLS_LE_LOX10:
this->relocate_tls(relinfo, target, relnum, rela,
r_type);
break;
+ case elfcpp::R_SPARC_TLS_IE_ADD:
+ // This seems to be mainly so that we can find the addition
+ // instruction if there is one. There doesn't seem to be any
+ // actual relocation to apply.
+ break;
+
case elfcpp::R_SPARC_TLS_LE_HIX22:
// If we're creating a shared library, a dynamic relocation will
// have been created for this location, so do not apply it now.
bool needs_special_offset_handling,
unsigned char* view,
typename elfcpp::Elf_types<size>::Elf_Addr address,
- section_size_type view_size)
+ section_size_type view_size,
+ const Reloc_symbol_changes* reloc_symbol_changes)
{
typedef Target_sparc<size, big_endian> Sparc;
typedef typename Target_sparc<size, big_endian>::Relocate Sparc_relocate;
needs_special_offset_handling,
view,
address,
- view_size);
+ view_size,
+ reloc_symbol_changes);
}
// Return the size of a relocation while scanning during a relocatable
template<int size, bool big_endian>
void
Target_sparc<size, big_endian>::scan_relocatable_relocs(
- const General_options& options,
Symbol_table* symtab,
Layout* layout,
Sized_relobj<size, big_endian>* object,
gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA,
Scan_relocatable_relocs>(
- options,
symtab,
layout,
object,
(size == 64 ? "elf64-sparc" : "elf32-sparc"))
{ }
- Target* instantiated_target_;
-
Target* do_recognize(int machine, int, int)
{
switch (size)
return NULL;
}
- return do_instantiate_target();
+ return this->instantiate_target();
}
Target* do_instantiate_target()
- {
- if (this->instantiated_target_ == NULL)
- this->instantiated_target_ = new Target_sparc<size, big_endian>();
- return this->instantiated_target_;
- }
+ { return new Target_sparc<size, big_endian>(); }
};
Target_selector_sparc<32, true> target_selector_sparc32;
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